Just in case anybody is facing similar dilemma. This snippet is working for
basic cases. Have not tried all failures yet
private void createCHRouterWithRoutees(){
Set<Routee> routees = new HashSet<Routee>();
for (int i=0;i<WORKER_POOL_SIZE;i++){
ActorRef worker = getContext().actorOf(Props.create(JobWorker.class),
"worker-" + String.valueOf(i)) ;
getContext().watch(worker);
routees.add(new ActorRefRoutee(worker));
}
ConsistentHashingRoutingLogic routingLogic = new
ConsistentHashingRoutingLogic(getContext().system());
routingLogic = routingLogic.withHashMapper(new JobKeyBasedHashMapper());
router = new Router(routingLogic,routees);
}
Since the spawned children are death-watched, upon receiving Terminated
message, I do following to recreate the routee and add back to router
else if (message instanceof Terminated){
//handle routee termination
ActorRef terminatedActor = ((Terminated) message).actor();
String terminatedActorName = terminatedActor.path().name();
router = router.removeRoutee(terminatedActor);
ActorRef r = getContext().actorOf(Props.create(JobWorker.class),
terminatedActorName);
getContext().watch(r);
router = router.addRoutee(new ActorRefRoutee(r));
}
Regards
Muthu
On Monday, 15 August 2016 18:04:14 UTC+5:30, Muthukumaran Kothandaraman
wrote:
>
> Hi,
>
> I am using akka 2.4.8 and creating CH Group as following (with my custom
> HashMapper)
>
> Set<String> actorPaths = new HashSet<String>();
>
>
> for (int i=0;i<WORKER_POOL_SIZE;i++){
> ActorRef worker = getContext().actorOf(Props.create(JobWorker.class),
> "jobworker-" + String.valueOf(i)) ;
> actorPaths.add(worker.path().toStringWithAddress());
> }
>
>
> getContext().actorOf(
> *new* ConsistentHashingGroup(actorPaths)
> .withHashMapper(new JobKeyBasedHashMapper())
> .props(),
> "jobrouter");
>
>
> Now, assuming I have a death-watch on routees and recreate the same upon
> Terminated message, will it be added automatically to the group ?
>
>
> If not, is there any other alternative approach using CH Group ?
>
>
> One way I could think of is to use plain Router with
> ConsistentHashingRoutingLogic. But I could not figure out how to inject my
> custom hashing based on message into ConsistentHashingRoutingLogic.
>
>
> Regards
>
> Muthu
>
>
>
>
>
>
>
>
>
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